Return to the home page...

Go Back   Moyer Marine Atomic 4 Community - Home of the Afourians > Discussion Topics > Cooling System

Reply
 
Thread Tools Display Modes
  #1   IP: 193.253.220.149
Old 07-22-2011, 08:18 AM
Kelly's Avatar
Kelly Kelly is offline
Afourian MVP
 
Join Date: Oct 2004
Location: Brest, France
Posts: 663
Thanks: 0
Thanked 9 Times in 7 Posts
Cooling water exhaust flow (video examples)

I was recently inspired by Mo's posting of a video showing flow rates for exhaust cooling water (found here).

Often I would like to compare engine performance (sounds, techniques, tips...) in video form with afourians but video postings are fairly rare although increasing in frequency as of late.

Here is my first contribution in response to Mo's video. I show pretty much the same procedure: cold start, exhaust flow at idle and then again at about 1500 RPM.

[YOUTUBE]umUP2u2hR4E[/YOUTUBE]

Hopefully the comparison will be instructive (it already has been for me) and will inspire others to contribute. We could start other threads for different subjects and perhaps keep "(video examples)" in the thread title to facilitate searching.
__________________
Kelly

1964 Cheoy Lee Bermuda Ketch, Wind and Atomic powered

Reply With Quote
  #2   IP: 24.224.206.117
Old 07-22-2011, 11:04 AM
Mo's Avatar
Mo Mo is offline
Afourian MVP
 
Join Date: Jun 2007
Location: Halifax NS,
Posts: 4,470
Thanks: 292
Thanked 411 Times in 272 Posts
Cool. Good show!
__________________
Mo

"Odyssey"
1976 C&C 30 MKI

The pessimist complains about the wind.
The optimist expects it to change.
The realist adjusts the sails.
...Sir William Arthur Ward.
Reply With Quote
  #3   IP: 72.84.133.137
Old 07-22-2011, 01:23 PM
Administrator's Avatar
Administrator Administrator is offline
MMI Webmaster
 
Join Date: Oct 2004
Location: Chestertown, MD (Langford Creek)
Posts: 2,198
Thanks: 1,335
Thanked 365 Times in 182 Posts
Wish we could put some volumetric #'s on these (gallons/minute).

Bill
Reply With Quote
  #4   IP: 63.239.65.11
Old 07-22-2011, 02:55 PM
Baltimore Sailor's Avatar
Baltimore Sailor Baltimore Sailor is offline
Afourian MVP
 
Join Date: May 2007
Location: Monrovia, MD
Posts: 640
Thanks: 0
Thanked 6 Times in 6 Posts
Next time I'm at the boat I'll hang a five-gallon bucket over the stern, time it for a minute, and see how many gallons I got.
Reply With Quote
  #5   IP: 193.253.220.149
Old 07-25-2011, 03:50 AM
Kelly's Avatar
Kelly Kelly is offline
Afourian MVP
 
Join Date: Oct 2004
Location: Brest, France
Posts: 663
Thanks: 0
Thanked 9 Times in 7 Posts
...and I will try to do the same.
__________________
Kelly

1964 Cheoy Lee Bermuda Ketch, Wind and Atomic powered

Reply With Quote
  #6   IP: 144.230.63.57
Old 08-16-2011, 06:26 PM
pallen58's Avatar
pallen58 pallen58 is offline
Senior Member
 
Join Date: Oct 2009
Location: Leawood KS
Posts: 50
Thanks: 0
Thanked 0 Times in 0 Posts
Nice video. I just re-built my water pump. The impellar looked like an Oreo that had seen better days, no telling when the PO had changed it, if she ever did, and I'll bet the shaft had a 1/16th groove in it. Thanks to Marthur and all the others on this site who have posted re-build information. It sure made the job easy. The best part of all is that it is back on the boat and working like a champ. No leaks! We where a little surpised at how much water was now coming out. before it would spit perhaps a foot behind the boat and now I'll bet it is hitting the water 2 1/2 feet back. Sure a lot more than in this video. Thanks again. Now on to the new altenator and an engine re-wire. I'll soon have a new engine.
Reply With Quote
  #7   IP: 75.225.180.107
Old 08-17-2011, 12:02 PM
Carl-T705 Carl-T705 is offline
 
Join Date: Jul 2011
Location: Georgia
Posts: 251
Thanks: 0
Thanked 0 Times in 0 Posts
Something to keep in mind is when replacing the suction hose to the pump many people use common automotive heater hose. This is really a mistake, heater/coolant hose is not made to be to be used in suction. If you have ever changed the lower radiator hose on a car you will find a coiled steel wire on the inside ,this is to keep the hose from collapsing. A collapsed suction hose will restrict the flow to the point the engine over heats. The higher the rpm, the greater the suction. This is especially true if you are not running a thermostat. Suction hose is available from any place that makes up hydraulic hose, some NAPA stores as well. Cheers
Reply With Quote
  #8   IP: 76.106.2.171
Old 08-18-2011, 06:50 PM
Baltimore Sailor's Avatar
Baltimore Sailor Baltimore Sailor is offline
Afourian MVP
 
Join Date: May 2007
Location: Monrovia, MD
Posts: 640
Thanks: 0
Thanked 6 Times in 6 Posts
I finally got around yesterday to measuring the outflow from the exhaust. I stuck a five-gallon bucket under the exhaust and timed it for one minute at 1000 rpm and another at 2000 rpm.

I got about two gallons at 1000 rpm and just a little more at 2000 rpm -- not significantly different, maybe a quart at the most.

I'd think after a new pump installation and complete exhaust/manifold rebuild/replacement, I'd get a bit better than that. I have a valve installed between the T-fitting and the thermostat, and it's completely closed off to send all the water into the head. I run at about 175F with the hot plugs in.

Should I be getting more flow than that? I also get good steam off the water even now, but it is hot water coming out of there. I'd put it at a good 150F at least. (I should take my digital thermometer and see what the temp actually is.)

Well, there's my results. Has anyone else taken a measurement?
Reply With Quote
  #9   IP: 151.200.57.102
Old 08-18-2011, 09:47 PM
sastanley's Avatar
sastanley sastanley is online now
Afourian MVP
 
Join Date: Sep 2008
Location: Solomons, MD
Posts: 7,016
Thanks: 1,134
Thanked 600 Times in 442 Posts
BS, I haven't measured flow directly yet, but I was sucking out of a 5 gallon bucket, roughly 2 gallons per minute when I was using it to winterize.

Recently, my IR laser thermometer was reading about 115-120 F water as it exited the manifold on its way to the water lift muffler & my gauge was reading 160 F. However, at the #1 spark plug the head temp was reading 375 F!
__________________
-Shawn
"Holiday" - '89 Alura 35 #109
"Twice Around" - '77 C-30, #511 with original A-4 & MMI manifold - SOLD! (no longer a two boat owner!!)
http://www.moyermarine.com/forums/signaturepics/sigpic3231_6.gif

Last edited by sastanley; 08-19-2011 at 09:31 AM.
Reply With Quote
  #10   IP: 75.243.12.51
Old 08-19-2011, 09:10 AM
Administrator's Avatar
Administrator Administrator is offline
MMI Webmaster
 
Join Date: Oct 2004
Location: Chestertown, MD (Langford Creek)
Posts: 2,198
Thanks: 1,335
Thanked 365 Times in 182 Posts
I found this performance table for the Oberdorfer pump on their website. Seeing little or no change in throughput when doubling RPM's doesn't seem to make much sense unless the head the pump is fighting is really tremendous, and beyond anything you can imagine with this engine.

(I think....) Or maybe the head really is that high....

Bill
Attached Images
 

Last edited by Administrator; 08-19-2011 at 09:19 AM.
Reply With Quote
The Following User Says Thank You to Administrator For This Useful Post:
TimBSmith (09-29-2020)
  #11   IP: 63.239.65.11
Old 08-19-2011, 09:38 AM
Baltimore Sailor's Avatar
Baltimore Sailor Baltimore Sailor is offline
Afourian MVP
 
Join Date: May 2007
Location: Monrovia, MD
Posts: 640
Thanks: 0
Thanked 6 Times in 6 Posts
This doesn't have anything to do with the pump, but I had an interesting experience the other day. I'd fired up the engine and was idling at the dock when I noticed water coming from the engine compartment. When I took a peek inside I saw that the anti-siphon valve had unscrewed itself, and water was bubbling out of the hole like a school drinking fountain.

I shut it down and screwed it back in place, and I've checked it for tightness before starting ever since.

All I used on the threads was a bit of teflon tape; should I use a bit of Permatex there as well? Has anyone else had this happen?
Reply With Quote
  #12   IP: 75.197.120.121
Old 08-20-2011, 09:07 AM
Administrator's Avatar
Administrator Administrator is offline
MMI Webmaster
 
Join Date: Oct 2004
Location: Chestertown, MD (Langford Creek)
Posts: 2,198
Thanks: 1,335
Thanked 365 Times in 182 Posts
Quote:
Seeing little or no change in throughput when doubling RPM's doesn't seem to make much sense unless the head the pump is fighting is really tremendous, and beyond anything you can imagine with this engine.

(I think....) Or maybe the head really is that high....
Anybody up for plumbing a pressure gauge just downstream of the raw water pump?

Bill
Reply With Quote
  #13   IP: 107.0.6.242
Old 08-20-2011, 11:52 AM
hanleyclifford's Avatar
hanleyclifford hanleyclifford is offline
Afourian MVP
 
Join Date: Mar 2010
Posts: 6,978
Thanks: 172
Thanked 280 Times in 226 Posts
Talking

Quote:
Originally Posted by Administrator View Post
I found this performance table for the Oberdorfer pump on their website. Seeing little or no change in throughput when doubling RPM's doesn't seem to make much sense unless the head the pump is fighting is really tremendous, and beyond anything you can imagine with this engine.

(I think....) Or maybe the head really is that high....

Bill
It isn't just "head"the pump is fighting; it's the restrictive fittings. The machined brass 90 degree fitting should be eliminated from the repertoire. Remember the testing Tom Thatch did comparing the cast "plumbers" style with the "machined" type.
Reply With Quote
The Following User Says Thank You to hanleyclifford For This Useful Post:
TimBSmith (09-29-2020)
  #14   IP: 69.97.213.125
Old 08-21-2011, 08:36 AM
Administrator's Avatar
Administrator Administrator is offline
MMI Webmaster
 
Join Date: Oct 2004
Location: Chestertown, MD (Langford Creek)
Posts: 2,198
Thanks: 1,335
Thanked 365 Times in 182 Posts
Hanley:

I wasn't using "head" in the context of lift. You'll see that the Oberdorfer chart uses "lift" and "psi" interchangeably, though obviously in different units of measurement.

"Head is a measure of energy. The units of energy are expressed in feet or meters. Pressure is a force applied to a unit of area, such as a pound of force applied to a square inch of area, or PSI. For water, we can say that had in feet divided by 2.31 is pressure in PSI, and pressure in PSI multiplied by 2.31 is head in feet. Stated mathematically:

Head (ft.)/2.31 = PSI and PSI x 2.31 = Head (feet)"

Bill
Reply With Quote
  #15   IP: 24.152.131.220
Old 08-21-2011, 09:05 AM
ndutton's Avatar
ndutton ndutton is offline
Afourian MVP
 
Join Date: May 2009
Location: Torrance, CA
Posts: 9,619
Thanks: 198
Thanked 2,208 Times in 1,425 Posts
I'm wondering if a change in flow was difficult to notice due to the batching discharge of the waterlift exhaust. A steady flow is one thing but an intermittent sploosh is another and exhaust system size can dramatically affect its appearance.
__________________
Neil
1977 Catalina 30
San Pedro, California
prior boats 1987 Westsail 32, 1970 Catalina 22
Had my hands in a few others
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
No water flow in raw water cooling system LIG-C27 Cooling System 7 08-08-2011 02:56 PM
Sporadic cooling 160-200+, back to 140 JimB Cooling System 7 06-21-2010 09:19 AM
Much much water in Atomic 4 seators Tartan 7 04-08-2009 03:10 PM
Cooling System Water Flow Speple` Cooling System 5 07-02-2008 11:15 PM
Much much water in Atomic 4 seators Cooling System 3 08-10-2006 03:31 PM


All times are GMT -4. The time now is 08:26 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.


Universal® is a registered trademark of Westerbeke Corporation

Copyright © 2004-2024 Moyer Marine Inc.

All Rights Reserved